Input mechanism



FIG. 1 is a front perspective view of an input mechanism showing our new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines in the Figures show portions of the input mechanism that form no part of the claimed design. 

CLAIM The ornamental design for an input mechanism, as shown and described. 